Malicious PDF — malware analysis report

Static analysis result for SHA-256 d03d6f6124823497…

MALICIOUS

PDF

88.1 KB Created: 2021-08-11 00:42:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 34eed1fe44f0ad9186f268fb7dc3b547 SHA-1: 75bde0875d6e899c9a29a7a0696bca9bb4424721 SHA-256: d03d6f61248234972814cb66fc77ac1c84005d18c02acb696be4b02b16334c6c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains numerous embedded URLs pointing to compromised websites and disposable hosting, suggesting a phishing or link-farming campaign. The presence of external URI links indicates an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://pixomot.ru/uplcv?utm_term=how+to+apply+for+a+marriage+allowance PDF link annotation
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/16097409be6dd8---26658434159.pdfIn PDF document text
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/afc63f5258c4eb338708a6728571fb01/zodakusutitilagosozap.pdfIn PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/176f69cad911fc95c7b851c755d2ffe5/81033577272.pdfIn PDF document text
    • http://wisdomtours.net/upload/file/fufijexorura.pdfIn PDF document text
    • http://imhkayseri.com/resimler/files/rizurukoforofojujadusi.pdfIn PDF document text
    • http://ponyomaru.com/files/files/zapurowaro.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/6eae9fcd1c2f3377f206e1d0b3902e92/1401321379.pdfIn PDF document text
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/b6150b2f7713fdd1fb985b80bd31f271/69039273720.pdfIn PDF document text
    • http://cisseo.net/userfiles/files/tenizidanevixawarumudik.pdfIn PDF document text
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/82d0a304ceda3717b72ee416a44b5cd3/fizawibapetuxarakili.pdfIn PDF document text
    • http://sireny.net/share/files/jipilorus.pdfIn PDF document text
    • https://hartwellcook.com/wp-content/plugins/super-forms/uploads/php/files/5e58686c95893116fd8af4ffe1b56850/pufujogekipiniburunitugit.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609046bb9205b---bufeloxumofi.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1610bc25489074---kisuvomupip.pdfIn PDF document text
    • https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/2b526929ca7aaf2dc5b648f44d9c8028/75250021217.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607c12276b746---xavabalototilokiban.pdfIn PDF document text
    • http://exclusivelimoservice.com/ckfinder/userfiles/files/94787534577.pdfIn PDF document text
    • http://playeasypiano.com/resources/fck_images/verabepovopokusit.pdfIn PDF document text
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/3426mau8175c3ngesf79f54aa8/68743029931.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc2961ea6ef---72339881541.pdfIn PDF document text
    • http://nuestratierrapremios.com/campannas/file/minozebi.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/22j9v54dro70a5tvs02gcoo5k3/getom.pdfIn PDF document text
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/e600e775e5f4c7689f0405cd20a818dd/42895619463.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001090e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1090E 10848 bytes
SHA-256: 4425035e8e6ee6f5bf53a721e54444b5e21c228c6ab9c2840db30539f06a4f8d
font_02_sfnt_off0001221f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1221F 18084 bytes
SHA-256: 3444c6390e81735366d183233212e23f7df087223571b8961a259331d5f3f3f3

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